diff --git a/drivers/ddr/altera/sdram_soc64.c b/drivers/ddr/altera/sdram_soc64.c
index 985a108..e0d04cc 100644
--- a/drivers/ddr/altera/sdram_soc64.c
+++ b/drivers/ddr/altera/sdram_soc64.c
@@ -10,6 +10,7 @@
 #include <errno.h>
 #include <div64.h>
 #include <fdtdec.h>
+#include <hang.h>
 #include <ram.h>
 #include <reset.h>
 #include "sdram_soc64.h"